'\" te
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.TH DEROFF 1 "Sep 14, 1992"
.SH NAME
deroff \- remove nroff/troff, tbl, and eqn constructs
.SH SYNOPSIS
.LP
.nf
\fBderoff\fR [\fB-m\fR [m | s | l]] [\fB-w\fR] [\fB-i\fR] [\fIfilename\fR...]
.fi

.SH DESCRIPTION
.sp
.LP
\fBderoff\fR reads each of the \fIfilenames\fR in sequence and removes all
\fBtroff\fR(1) requests, macro calls, backslash constructs, \fBeqn\fR(1)
constructs (between \fB\&.EQ\fR and \fB\fR\fB\&.EN\fR\fB \fR lines, and between
delimiters), and \fBtbl\fR(1) descriptions, perhaps replacing them with white
space (blanks and blank lines), and writes the remainder of the file on the
standard output. \fBderoff\fR follows chains of included files (\fB\&.so\fR and
\fB\&.nx\fR \fBtroff\fR commands); if a file has already been included, a
\fB\&.so\fR naming that file is ignored and a \fB\&.nx\fR naming that file
terminates execution. If no input file is given, \fBderoff\fR reads the
standard input.
.SH OPTIONS
.sp
.ne 2
.na
\fB\fB-m\fR\fR
.ad
.RS 6n
The \fB-m\fR option may be followed by an \fBm\fR, \fBs\fR, or \fBl\fR. The
\fB-mm\fR option causes the macros to be interpreted so that only running text
is output (that is, no text from macro lines.)  The \fB-ml\fR option forces the
\fB-mm\fR option and also causes deletion of lists associated with the \fBmm\fR
macros.
.RE

.sp
.ne 2
.na
\fB\fB-w\fR\fR
.ad
.RS 6n
If the \fB-w\fR option is given, the output is a word list, one ``word'' per
line, with all other characters deleted. Otherwise, the output follows the
original, with the deletions mentioned above. In text, a ``word'' is any string
that \fIcontains\fR at least two letters and is composed of letters, digits,
ampersands (\fB&\fR), and apostrophes (\fB\&'\fR); in a macro call, however, a
``word'' is a string that \fIbegins\fR with at least two letters and contains a
total of at least three letters. Delimiters are any characters other than
letters, digits, apostrophes, and ampersands. Trailing apostrophes and
ampersands are removed from ``words.''
.RE

.sp
.ne 2
.na
\fB\fB-i\fR\fR
.ad
.RS 6n
The  \fB-i\fR option causes  \fBderoff\fR to ignore  \fB\&.so\fR and
\fB\&.nx\fR commands.
.RE

.SH SEE ALSO
.sp
.LP
.BR eqn (1),
.BR nroff (1),
.BR tbl (1),
.BR troff (1),
.BR attributes (7)
.SH NOTES
.sp
.LP
\fBderoff\fR is not a complete \fBtroff\fR interpreter, so it can be confused
by subtle constructs. Most such errors result in too much rather than too
little output.
.sp
.LP
The \fB-ml\fR option does not handle nested lists correctly.
